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Finding the Fourth Proportional to 651,642.90, 978,339.15 and 416,030.10

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Solution

The fourth proportional to 651,642.90, 978,339.15 and 416,030.10 is: 624,603.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,642.90 : 978,339.15 = 416,030.10 : x
  2. Step 2: Convert to fraction form
    651,642.90/978,339.15 = 416,030.10/x
  3. Step 3: Cross multiply
    651,642.90x = 978,339.15 × 416,030.10
  4. Step 4: Simplify right side
    651,642.90x = 407,018,534,408.42
  5. Step 5: Solve for x
    x = 407,018,534,408.42/651,642.90
  6. Step 6: Final answer
    x = 624,603.65

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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.