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Finding the Fourth Proportional to 660,430, 911,404.74 and 358,624

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Solution

The fourth proportional to 660,430, 911,404.74 and 358,624 is: 494,907.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,430 : 911,404.74 = 358,624 : x
  2. Step 2: Convert to fraction form
    660,430/911,404.74 = 358,624/x
  3. Step 3: Cross multiply
    660,430x = 911,404.74 × 358,624
  4. Step 4: Simplify right side
    660,430x = 326,851,613,477.76
  5. Step 5: Solve for x
    x = 326,851,613,477.76/660,430
  6. Step 6: Final answer
    x = 494,907.28

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