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Finding the Fourth Proportional to 978,099.40, 1,349,312.40 and 651,564.22

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Solution

The fourth proportional to 978,099.40, 1,349,312.40 and 651,564.22 is: 898,849.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,099.40 : 1,349,312.40 = 651,564.22 : x
  2. Step 2: Convert to fraction form
    978,099.40/1,349,312.40 = 651,564.22/x
  3. Step 3: Cross multiply
    978,099.40x = 1,349,312.40 × 651,564.22
  4. Step 4: Simplify right side
    978,099.40x = 879,163,681,442.33
  5. Step 5: Solve for x
    x = 879,163,681,442.33/978,099.40
  6. Step 6: Final answer
    x = 898,849.01

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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.