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Finding the Fourth Proportional to 648,931.71, 895,543.81 and 358,561.98

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Solution

The fourth proportional to 648,931.71, 895,543.81 and 358,561.98 is: 494,825.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,931.71 : 895,543.81 = 358,561.98 : x
  2. Step 2: Convert to fraction form
    648,931.71/895,543.81 = 358,561.98/x
  3. Step 3: Cross multiply
    648,931.71x = 895,543.81 × 358,561.98
  4. Step 4: Simplify right side
    648,931.71x = 321,107,961,690.34
  5. Step 5: Solve for x
    x = 321,107,961,690.34/648,931.71
  6. Step 6: Final answer
    x = 494,825.51

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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.