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Finding the Fourth Proportional to 520,281.80, 779,547.90 and 431,052.20

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Solution

The fourth proportional to 520,281.80, 779,547.90 and 431,052.20 is: 645,853.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,281.80 : 779,547.90 = 431,052.20 : x
  2. Step 2: Convert to fraction form
    520,281.80/779,547.90 = 431,052.20/x
  3. Step 3: Cross multiply
    520,281.80x = 779,547.90 × 431,052.20
  4. Step 4: Simplify right side
    520,281.80x = 336,025,837,300.38
  5. Step 5: Solve for x
    x = 336,025,837,300.38/520,281.80
  6. Step 6: Final answer
    x = 645,853.53

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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.