Home / 989,404.60-1,484,798.10-428,841.40

Finding the Fourth Proportional to 989,404.60, 1,484,798.10 and 428,841.40

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Solution

The fourth proportional to 989,404.60, 1,484,798.10 and 428,841.40 is: 643,561.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,404.60 : 1,484,798.10 = 428,841.40 : x
  2. Step 2: Convert to fraction form
    989,404.60/1,484,798.10 = 428,841.40/x
  3. Step 3: Cross multiply
    989,404.60x = 1,484,798.10 × 428,841.40
  4. Step 4: Simplify right side
    989,404.60x = 636,742,895,921.34
  5. Step 5: Solve for x
    x = 636,742,895,921.34/989,404.60
  6. Step 6: Final answer
    x = 643,561.69

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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.