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Finding the Fourth Proportional to 910,428, 1,256,390.75 and 502,529.98

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Solution

The fourth proportional to 910,428, 1,256,390.75 and 502,529.98 is: 693,491.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    910,428 : 1,256,390.75 = 502,529.98 : x
  2. Step 2: Convert to fraction form
    910,428/1,256,390.75 = 502,529.98/x
  3. Step 3: Cross multiply
    910,428x = 1,256,390.75 × 502,529.98
  4. Step 4: Simplify right side
    910,428x = 631,374,018,469.69
  5. Step 5: Solve for x
    x = 631,374,018,469.69/910,428
  6. Step 6: Final answer
    x = 693,491.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.