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Finding the Fourth Proportional to 665,614.40, 918,547.68 and 363,808.40

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Solution

The fourth proportional to 665,614.40, 918,547.68 and 363,808.40 is: 502,055.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,614.40 : 918,547.68 = 363,808.40 : x
  2. Step 2: Convert to fraction form
    665,614.40/918,547.68 = 363,808.40/x
  3. Step 3: Cross multiply
    665,614.40x = 918,547.68 × 363,808.40
  4. Step 4: Simplify right side
    665,614.40x = 334,175,361,784.51
  5. Step 5: Solve for x
    x = 334,175,361,784.51/665,614.40
  6. Step 6: Final answer
    x = 502,055.49

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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.