Home / 989,641.80-1,484,171.10-390,403.80

Finding the Fourth Proportional to 989,641.80, 1,484,171.10 and 390,403.80

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Solution

The fourth proportional to 989,641.80, 1,484,171.10 and 390,403.80 is: 585,490.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,641.80 : 1,484,171.10 = 390,403.80 : x
  2. Step 2: Convert to fraction form
    989,641.80/1,484,171.10 = 390,403.80/x
  3. Step 3: Cross multiply
    989,641.80x = 1,484,171.10 × 390,403.80
  4. Step 4: Simplify right side
    989,641.80x = 579,426,037,290.18
  5. Step 5: Solve for x
    x = 579,426,037,290.18/989,641.80
  6. Step 6: Final answer
    x = 585,490.67

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Double scale
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1.5x scale

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.