Home / 687,457.70-1,031,184.72-387,802.25

Finding the Fourth Proportional to 687,457.70, 1,031,184.72 and 387,802.25

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Solution

The fourth proportional to 687,457.70, 1,031,184.72 and 387,802.25 is: 581,702.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,457.70 : 1,031,184.72 = 387,802.25 : x
  2. Step 2: Convert to fraction form
    687,457.70/1,031,184.72 = 387,802.25/x
  3. Step 3: Cross multiply
    687,457.70x = 1,031,184.72 × 387,802.25
  4. Step 4: Simplify right side
    687,457.70x = 399,895,754,581.62
  5. Step 5: Solve for x
    x = 399,895,754,581.62/687,457.70
  6. Step 6: Final answer
    x = 581,702.34

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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.