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Finding the Fourth Proportional to 659,345.40, 989,018.10 and 553,057.20

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Solution

The fourth proportional to 659,345.40, 989,018.10 and 553,057.20 is: 829,585.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,345.40 : 989,018.10 = 553,057.20 : x
  2. Step 2: Convert to fraction form
    659,345.40/989,018.10 = 553,057.20/x
  3. Step 3: Cross multiply
    659,345.40x = 989,018.10 × 553,057.20
  4. Step 4: Simplify right side
    659,345.40x = 546,983,581,135.32
  5. Step 5: Solve for x
    x = 546,983,581,135.32/659,345.40
  6. Step 6: Final answer
    x = 829,585.80

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Double scale
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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.